Pith Number

pith:FLVXBA5Q

pith:2015:FLVXBA5QFDF2PNQ7GQA7GK3KT2

not attested not anchored not stored refs pending

Angular Size-Redshift: Experiment and Calculation

V.R. Amirkhanyan

arxiv:1501.02690 v1 · 2015-01-12 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FLVXBA5QFDF2PNQ7GQA7GK3KT2}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T02:29:37.469570Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2aeb7083b028cba7b61f3401f32b6a9e8a7269afd7e1ddceaf59d2ddeb8f42bc

Aliases

arxiv: 1501.02690 · arxiv_version: 1501.02690v1 · doi: 10.48550/arxiv.1501.02690 · pith_short_12: FLVXBA5QFDF2 · pith_short_16: FLVXBA5QFDF2PNQ7 · pith_short_8: FLVXBA5Q

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/FLVXBA5QFDF2PNQ7GQA7GK3KT2 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 2aeb7083b028cba7b61f3401f32b6a9e8a7269afd7e1ddceaf59d2ddeb8f42bc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1cf11bc67bbd1bbebe4642aa177cbf89a50a393c012debdc1f6acf05b756f8b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2015-01-12T16:19:58Z",
    "title_canon_sha256": "7af8380b88b1e03f835c5a2ae1822ced429706134d7f4b5e1b7917e8e9327853"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.02690",
    "kind": "arxiv",
    "version": 1
  }
}